From 5636ec4eb6b804cd7e67e3a896f1624609dfb427 Mon Sep 17 00:00:00 2001 From: Trond Myklebust Date: Tue, 31 Jul 2018 15:54:11 -0400 Subject: NFSv4: Detect nlink changes on cross-directory renames too If the object being renamed from one directory to another is also a directory, then 'nlink' will change for both directories. Signed-off-by: Trond Myklebust Signed-off-by: Anna Schumaker --- fs/nfs/nfs4proc.c | 35 +++++++++++++++++++++++------------ 1 file changed, 23 insertions(+), 12 deletions(-) (limited to 'fs/nfs/nfs4proc.c') diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 6b8822192397..aa4fd5edfba4 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -1094,13 +1094,14 @@ nfs4_dec_nlink_locked(struct inode *inode) static void update_changeattr_locked(struct inode *dir, struct nfs4_change_info *cinfo, - unsigned long timestamp) + unsigned long timestamp, unsigned long cache_validity) { struct nfs_inode *nfsi = NFS_I(dir); nfsi->cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME - | NFS_INO_INVALID_DATA; + | NFS_INO_INVALID_DATA + | cache_validity; if (cinfo->atomic && cinfo->before == inode_peek_iversion_raw(dir)) { nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; nfsi->attrtimeo_timestamp = jiffies; @@ -1118,10 +1119,10 @@ update_changeattr_locked(struct inode *dir, struct nfs4_change_info *cinfo, static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, - unsigned long timestamp) + unsigned long timestamp, unsigned long cache_validity) { spin_lock(&dir->i_lock); - update_changeattr_locked(dir, cinfo, timestamp); + update_changeattr_locked(dir, cinfo, timestamp, cache_validity); spin_unlock(&dir->i_lock); } @@ -2514,7 +2515,7 @@ static int _nfs4_proc_open(struct nfs4_opendata *data, if (data->file_created || inode_peek_iversion_raw(dir) != o_res->cinfo.after) update_changeattr(dir, &o_res->cinfo, - o_res->f_attr->time_start); + o_res->f_attr->time_start, 0); } if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) server->caps &= ~NFS_CAP_POSIX_LOCK; @@ -4292,7 +4293,7 @@ _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); if (status == 0) { spin_lock(&dir->i_lock); - update_changeattr_locked(dir, &res.cinfo, timestamp); + update_changeattr_locked(dir, &res.cinfo, timestamp, 0); /* Removing a directory decrements nlink in the parent */ if (ftype == NF4DIR && dir->i_nlink > 2) nfs4_dec_nlink_locked(dir); @@ -4372,7 +4373,8 @@ static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) &data->timeout) == -EAGAIN) return 0; if (task->tk_status == 0) - update_changeattr(dir, &res->cinfo, res->dir_attr->time_start); + update_changeattr(dir, &res->cinfo, + res->dir_attr->time_start, 0); return 1; } @@ -4414,9 +4416,18 @@ static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, return 0; if (task->tk_status == 0) { - update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start); - if (new_dir != old_dir) - update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start); + if (new_dir != old_dir) { + /* Note: If we moved a directory, nlink will change */ + update_changeattr(old_dir, &res->old_cinfo, + res->old_fattr->time_start, + NFS_INO_INVALID_OTHER); + update_changeattr(new_dir, &res->new_cinfo, + res->new_fattr->time_start, + NFS_INO_INVALID_OTHER); + } else + update_changeattr(old_dir, &res->old_cinfo, + res->old_fattr->time_start, + 0); } return 1; } @@ -4457,7 +4468,7 @@ static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); if (!status) { - update_changeattr(dir, &res.cinfo, res.fattr->time_start); + update_changeattr(dir, &res.cinfo, res.fattr->time_start, 0); status = nfs_post_op_update_inode(inode, res.fattr); if (!status) nfs_setsecurity(inode, res.fattr, res.label); @@ -4534,7 +4545,7 @@ static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_ if (status == 0) { spin_lock(&dir->i_lock); update_changeattr_locked(dir, &data->res.dir_cinfo, - data->res.fattr->time_start); + data->res.fattr->time_start, 0); /* Creating a directory bumps nlink in the parent */ if (data->arg.ftype == NF4DIR) nfs4_inc_nlink_locked(dir); -- cgit v1.2.3